Chlorinator



arch 21, 1939. H. J. PARDEE CHLORINATOR Filed March 25, 1936 2 SheetsSheet 1 Howard Jfardfe,

March 21, 1939?. H. J. PARDEE 2 Sheets-Sheet 2 m m M CHLORTNATOR A vWi-ll v ndur bv l hl Filed March 23, 1956 a N nu;

ll A'further advantage of the chlorinator conmodifications and changes are'possible without Patented Mar. 21, 1939 2,151,142

UNITED STATES PATENT OFFICE CHLORINATOB Howard J. rat-doc, New York, N. x. Application March 23, 1936, Serial No. 10,517 14 Claims. (01. 210-28) The present invention relates to apparatus parstruction of the present invention is that it mainticularly adapted to provide and control a flow tains the same high percentage of accuracy at its or feed of gas from a source of supply to a body lowest flow as it does at its maximum fiow. It

of water, sewage or the like material to be treated. has especial advantage over those machines which More particularly, the apparatus according to use only the pressure drop across their indicating 5 this invention is primarily adapted to the use orifice for control. Such machines, of necessity,

of chlorine as the treating gas. Chlorinating must have very small control pressure drops at apparatus is, of course, broadly old. However, their lower flows so that the relatively slight erthe chlorinators of the prior art present difilculrors in the maintenance of this small pressure ties and involve defects which are well recognized drop results in large errors in the maintenance 10 by the art, and it is a primary object of the presof the flow of chlorine. ent invention to overcome such diihcultles and The fundamental requirement of a manual defects. Accordingly, the present invention comchlorinator is that it maintain the feed of chloprises a novel and improved construction, comrine for which it is set absolutely constant and.

I3 bination and arrangement of parts, set forth in uniform until it is reset to feed another amount. 16 detail in the specific description which forms a t must re a t se t a c a y a d dep dpart of this specification. ably so that there is no undertreatment that may A major advantage of the chlorinator unit, a result in dangerous incomplete sterilization and cording to the present invention, is that neither there is no overdosing that m result i 11 20 the indication of the meter, which is ausual elepl asant tast s a d d s. T s fundame tal 2o ment of these units, nor the rate of fiow of the q m nt s fu d by e ppa atus made chlorine is dependent upon critical, definite adin flceflrdahce with p 'e entio justmen'ts of the devices used to maintain the A further object of the present invention is to control pressures. Each time the control valve Provide a relationship Parts 1 h character 7, of the apparatus sets the rate of flow to the exas to constitute a manually Operable unit, p d 5 act amount desired, as indicated by the meter, however to be readily converted into an automatic this flow is controlled by the particular adjustunit without sacrificing any of the v n es. ment of the control devices at that time, All hereinbefore mentioned, inherent in the manual that these devices are required to do is to mainconstruction.

3 tain these pressures constant, and not at any par- The present invention, its attributes and adticular or exact magnitude. With this arrangevantages, will be better understood by reference ment, as provided by this invention, the machine t t e fo w n e d de c t on of a preis not dependent upon periodic delicate and exleifred exemplary embodiment thereof and to the act adjustments of fundamental water levels. c mp ny n r w n wh r in such embodi- This greatly increases the general accuracy of ment is illustrated- 5 practical operation and, also, greatly simplifies 0n the said drawings, operation. This simplification of the apparatus Fig. 1 is a diag m p se t t on of a definitely results in more dependable and safer chlorinator unit according to the present invent1 tt of n id importion, illustrating the essential elements thereof 40 tance. and the fundamental relationship therebetween; 40

Another improvement flowing from the present Fig. 2 is a similar diag Showing, w invention is the inclusion of both the control certain of the parts being illustrated in greater valve and the indicating orifice in the so-called detail;

control pressure drop. This increases the con- F g. 3 s 8- 811 diagrammatic p esentation trol pressure drop and greatly increases the cof an automatic unit according to this invention;

curacy in the maintenance of the gas feed. The and Fig. 4 is a sectional view through a concrete control pressure drop is preferably about 24 inches embodiment of a chlorinator unit. in accordance of water, in the preferred embodiment of the inwith the Present inventiohvention as hereinafter described. It requires an Similar reference characters designate orreerror of one-half inch in this pressure drop to p in P r s hr llflh ll the several figures oi 50 change the feed of the unit by one percent. The drawin devices provided according to the invention will It is to be understood that the particular demaintain this pressure drop within a fraction of tails illustrated and described are intended to be this error. wholly exemplary in character, and that various departing from the spirit of the invention. Accordingly, the present invention is not intended to be limited, to the present specific disclosure nor otherwise than by the terms of the claims hereunto appended.

Referring now to the drawings, and more particularly at first to Fig. 1 thereof, reference numeral i0 designates a source of gas, e. g. chlorine, under pressure. The gas flows from source l0, shown on the drawings as a tank, to vacuum valve H of the diaphragm type, which valve admits chlorine to maintain aconstant slight vacuum on its diaphragm. At this slight vacuum, the gas flows to and through a variable orifice, or control valve, l2, through a calibrated indicating orifice 3, to a riser M, from which a water-operated,aspirator or injector l5 draws the chlorine and discharges it at I6 as a solution. From I 6, the solution is conveyed to the point of application in any suitable and/or conventional manner. Water for operating the injector 5 is supplied from any'suitable source ofsupply, and is delivered at IT. The bottom of riser I4 is sealed in water reservoir Hi, the level in which is maintained by a float-controlled water valve I9, and water being supplied as required through conduit 20 connected to the water supply. Orifice I3 is associated with a manometer 2| provided with a scale, preferably reading directly in pounds of chlorine per 24 hrs.

The essential accurate maintenance of feed is accomplished in this chlorinator by maintaining a constant pressure drop across two orifices in series, namely, control valve or variable orifice l2 and calibrated indicating orifice l3. The constant pressure drop is maintained by the constant slight vacuum held on the diaphragm of the vacuum valve H, ahead of the orifices, and the constant greater vacuum held in the top of riser M, on the discharge of the orifices. With a constant pressure maintained on each side of these orifices, the pressure drop across them is correspondingly constant and the flow of gas through them is maintained constant,

As hereinbefore indicated, power to operate the chlorinator is provided by the suction of aspirator or injector l5, which injector is of such character that it always has excess capacity to pull, through its side opening, more chlorine than the machine feeds. This excess capacity will continually draw water up the riser M from water reservoir Hi; When the water is drawn up and into the side opening of the injector, the latter is choked, and no greater suction can be put on the riser H4 or the water will shut 01f the inlet of the injector I5 completely. This results in a constant vacuum in the gas space I4 at the top of riser i4, equal to the height a of the water column, with a mixture of water'and chlorine being continuously drawn into the injector i5 through its side opening. In this manner, a constant pressure is maintained on the discharge of the orifices l2 and I3.

The level in water reservoir 3 is maintained very closely by float water valve l9. In this connection, it is to be noted that it is a constant height a, and not any particular or exact height, that is required. The adjustment must be kept within the limits of the overflow 22 and of the unsealing of riser 4, but the only difierence the exact location of this level makes in the actual operation of the chlorinator is a slight changing of the density of the gas passing through the orifices. A change of 1" in the length of water column a results in only a 1 of one percent error inthe indication of the meter 2| and the flow of chlorine through the unit. Accordingly, the adjustment of the water level in reservoir IB is not critical, and it is only necessary for the float valve 9 to maintain this level closely at whatever level it is adjusted to.

The pressure at the inlet of the orifices is the pressure on the diaphragm of vacuum valve II. This pressure remains constant within very close limits, the diaphragm being relatively large so that very minute variations of pressure on it will cause it to move to correct this pressure. Here again, it is a constant pressure, and not any particular or exact pressure, which is required.

Referring now to Fig. 2, which, like Fig. 1 is diagrammatic in character, but which shows the preferred relationship of parts in greater detail, the front leg of the manometer 2| is provided with a scale similar to that hereinbefore described. The back leg of the manometer rises as the well 23 for the vacuum relief to the meter overflow chamber 24 which overflows into the riser l4. The float valve III for the water reservoir I8 is located above the latter. -It is provided with a box 25 having an overflow 26 to reservoir 8. From a point in box 25, below the Water level, a conduit 21 connects to overflow chamber 24 of the meter.

The height b from the float valve box 25 to the meter overflow chamber 24 is less than the height a from the water reservoir I8 to the injector I5, so that water will be drawn from the float valve box 25 to the meter overflow chamber 24 in preference to being drawn up riser I4. As a result, the water passing through float valve box 25 will, to the capacity of connecting conduit 21, fiow to and over the meter overflow into riser l4, rather than to water reservoir l8 and thence to riser l4. This arrangement results in a small supply of water being constantly introduced into the meter overflow 24, supplying the meter and causing a continuous small overflow into riser I4. This definitely and exactly maintains the level of the back leg of the meter, which is the meter zero level. In this way, an absolutely constant zero level is obtained. Once the scale is set to this level, the setting is permanent until the apparatus is disassembled. Periodic adjustments of this level are not required. Conduit 21 may preferably be carried below the level of water reservoir l8 to provide a trap, which prevents an excess amount of water being drawn in through the meter overflow.

When meter overflow chamber 24 is empty, as it is when the apparatus is originally set up, the vacuum relief will become unsealed and it will be necessary to prime the relief before the requisite vacuum can be built up in the chlorinator. This may be accomplished by stopping the end of vacuum relief tube 28, which is exposed at the entrance of the vent discharge tube 29, usually with the finger, until water has risen in the meter, indicating that overflow chamber 24 has been filled.

If, through any failure of any part of the mechanism to function, chlorine enters the apparatus in such amount that the injector cannot take it away, this excess of gas will depress the water level in riser l4 and will escape from the bottom of the latter. A hood 30 is provided in water reservoir I8 around riser l4, and from this hood the vent tube 29 leads upward, housing within it the vacuum relief, hereinafter described. The chlorine-gas escaping through conduct 2!! may be led to any suitable point of disposition.

When the chlorine supply from tank It is shut off, the chlorine remaining in the chlorinator will slowly dissolve in the water in riser l4. As it dissolves, it will draw the water up to replace itself and, in this way, water may be drawn back through orifices l3 and I2 and even into the connections to the chlorinator. Although the apparatus is preferably suitably and completely protected against moist chlorine back to the chlorine shut-oil valve l0, e. g. by lining the parts with resistant material, such water will always entrain some fouling material which, in the smaller machines especially, may result in subsequent errors in operation.

Accordingly, the chlorinator apparatus of the present invention is provided with a vacuum relief which will admit air if the water starts to rise above a certain point in riser l4. The well 23 of this vacuum relief is also the back leg of the meter, as hereinbefore set forth, and is positioned inside of vent tube 29, as clearly shown on the drawings. Well 23 opens into meter overflow chamber 24 and is kept full of water from the latter. Vacuum relief tube 28 extends into well 23, which is sealed at its lower end, as shown. If the suction in riser i4 becomes greater than the submergence of tube 28 below the overflow, air is drawn in through the latter, relieving the suction and preventing flooding of the apparatus.

According to the preferred construction, tube 28 is closed at its lower end and is provided with a small opening 28 at a slight distance from the bottom. This small opening acts as a choke to prevent rapid surges and, being up oif the bottom,

dirt which may settle in the tube will not be likely to clog it. In this connection, the extent of submergence of tube 28 is to be noted; according to the invention, the submergence preferably is greater than distance a. but is less than the distance from the water level in reservoir [8 to the level in meter overflow chamber 24. In practice, it is halfway between these two distances.

In the event that the solution conduit It becomes plugged or because of other disturbances in the regular operation of the injector, water can comeback through the side opening of the injector. To take care of such back flow, reservoir i8 is provided with an overflow 22. There will be no flow of water whatsoever from overflow 22 during normal operation of the apparatus.

Referring now to Fig. 3 of the drawings, this is a diagrammatic showing of an embodiment of the present invention constituting an automatic vacuum chlorinator of the so-called proportional flow type. The unit, according to this embodiment of the invention, consists essentially of the manual chlorinator shown in Fig. 2 and hereinbefore described, together with additional parts whereby it is converted from a manual machine into an' automatic machine.

Parts common to the several embodiments are indicated by like reference characters, so that repeated description thereof will not be necessary. The additional parts consist of a vertical connection 3| rising to meter overfiow chamber 24. An orifice 32 is arranged in an orifice chamber in connection 3|. From a point on the latter, ahead of orifice 32, a pressure connection 33 leads to the back of an automatic diaphragm valve 34, which is connected into the chlorine flow between vacuum valve ii and control valve i2.

Operation of this embodiment of the invention is dependent upon .the setting up of a minor water flow to the chlorinator, which flow is exactlyproportional to the main flow of water and sewage or the like to be treated. This minor proportional flow. enters the chlorinator through conduit 3!. The precise manner in which this proportional flow is set up to vary exactly with the main ,flow differs for different installations and their varying conditions. Per se, this constitutes no part of the present invention, and any well known suitable and conventional means may be employed for this purpose. The amount of the minor proportional flow is preferably less than gallon per minute at its maximum.

The proportional minor flow of water through connection 3| sets up a pressure drop across orifice 32. The inlet pressure from this orifice 32 is transmitted through conduit 33 to the back of the automatic diaphragm 34 of diaphragm valve 34-. The level oithis diaphragm is at the static level of the meter overflow chamber 24 so that the actual pressure on the back of diaphragm 34 is more than the gas pressure against the surface of the water at the meter overflow 24 by the amount of the drop across orifice 32. At the level of diaphragm 34', the pressure is that on the in- ,let of orifice 32 less the height of the water column from the latter to the diaphragm 34'. 2

The pressure at the overflow level in 24 is the pressure on the discharge of orifice 32 less the height of the water column from 32 to the overflow level. Since the height from 32 to the diaphragm 34 equals the height from 32 to the overflow level, the pressure on the diaphragm 34' is as much greater than the pressure on the meter overflow level in 24 as the pressure drop through orifice 32.

Automatic diaphragm valve 34 is arranged so that its diaphragm 34' operates to keep the gas pressure on the front of the diaphragm equal to the water pressure on the back. If the gas pressure tends to become less, the diaphragm will move down admitting more gas. If the gas pressure on the front of the diaphragm tends to become greater, it will push the diaphragm up and throttle the flow of gas until equilibrium is established. Diaphragm 34 may thus properly be a vacuum system. It operates under a vacuum just as it would operate under pressure, only the pressures are below atmospheric, instead of above. The basic reference in pressure, or vacuum, is the amount of vacuum on the meter overflow level in 24, which is also the amount of vacuum on the discharge of the chlorine control orifices l2 and I3. The automatic valve 34 willkeep the pressure on the inlet of these orifices equal to the pressure drop across orifice 32. Therefore, as the pressure drop across orifice 32 changes, the pressure drop across the chlorine control orifices l2 and I3 will be changed in like amount. This means that the flow of chlorine through the chlorinator, i. e. through orifices l2 and I3, will vary in exact proportion to the flow of water through the orifice 32. In other words, the amount of chlorine which the chlorinator feeds will vary as the minor proportional flow through orifice 32 varies.

The ratio of the amount of chlorine to the amount of water is adjusted by the control valve or variable orifice l2. If the latter is wide open, the combined resistance of orifices l2 and I3 to the flow of chlorine is small in comparison with the resistance of orifice 32 to the minor flow of water, and the chlorinator will feed a relatively large amount of chlorine in ratio to the water. On the other hand, if control valve I2 is throttled down to a small opening or orifice, the combined resistance of orifices I 2 and I3 will be high as compared to that of orifice 32, and the chlorinator will feed a small amount of chlorine in ratio to the water.

To set the chlorinator to feed any definite ratio of chlorine to the main fiow of water being treated, the rate of fiow of the main flow of water at the time must, of course, be known. The amount of chlorine required for this particular fiow must be calculated. The control valve I2 is then adjusted so that the chlorinator is feeding this required amount of chlorine as indicated on the meter at 2|. This gives the right adjustment of the opening at I 2, and as the main flow of water varies from then on, the flow of chlorine will also vary to maintain the same dosage; i e. the same ratio of chlorine to water. This is usually expressed in parts per million; one part per million being 8 pounds of chlorine in one million gallons of water.

It is evident that the size of the water orifice 32 is important and must be exact if the range of chlorine flows is to properly balance against the main water flow.

In practice, the automatic diaphragm 34 is preferably slightly higher than the overflow level. This is due to the actual weight of the diaphragm itself, the effect of which on the pressures is thus compensated for.

Fig. 4 discloses the essential parts of a practical embodiment of a chlorinator constructed in accordance with the principles hereinbefore set forth. As before, corresponding parts are indicated by like reference characters, so that the operation and construction will be clearly apparent, particularly from the description hereinbefore set forth. It will therefore merely be necessary to further describe the slight differences which are preferably incorporated in a concrete form of the invention.

As before, the source of the chlorine or other gas being used is a tank [0, not shown on Fig. 4, the outlet from the tank being provided with chlorine shut-off valve Ill arranged ahead of vacuum valve I I, which, per se, is of more or less conventional construction, and functions as hereinbefore described. From valve H, the gas is led through conduit 35 to and through variable orifice l2, which assumes the form of a control valve, as shown. The casing of this valve extends through a panel 36 whereby the apparatus is substantially hidden from view, the only parts which are preferably exposed to view on the exterior of the panel being the manometer tube 2|, which communicates at its upper end with the casing of valve l2, the scale 31 which is associated with tube 2|, and the means l2 for operating valve l2.

After passing through the variable orifice l2, the gas passes through the fixed or indicating orifice l3, which may preferably be disposed at the top of riser l4. Aspirator I5 is connected to the latter, as shown,.and draws a mixture of chlorine and water from the riser through its choke or side opening [5. The mixture of chlorine and water is discharged in the form of a solution through conduit I6. Water for operating the aspirator comes from a suitable source of supply and enters at IT, assing through a strainer l1 before passing through the injector IS. The strainer casing houses a plurality of telescoping tubes, as shown, forming a liquid seal 38.

The bottom of riser I 4 is sealed in water reservoir 8, the water level in which is preferably maintained through the medium of float-controlled valve IS. The latter is associated with box 25 which, as shown in Fig. 4, overflows into reservoir l8 through connection 26. Well 25' depends from. box 25 and, in effect, is a continuation thereof, extending preferably into tube 26, wherein it may be housed, thus economizing space and favoring a compact assembly. From a point in well 25' below the level of water in reservoir l8, conduit 21 connects to meter overflow chamber 24, the overflow from which goes to riser H, as shown.

Front leg 2| of the manometer is associated with well 23 which rises to overflow chamber 24. Well 23 thus constitutes the back leg of the manometer. It also functions as an element of the vacuum relief of the chlorinator, housing vacuum relief tube 28 therewithin. Tube 23, and its associated tube 28, is disposed within vent tube 29, as shown.

Operation of the apparatus is substantially as hereinbefore described for the manually controlled form of the invention. In this connection, it is to be noted that the supply of water for the reservoir I8 also comes through l'l, casing 39 and conduit 20. The latter terminates in a well 20' which depends from box 25 and, for the sake of compactness, is preferably disposed alongside of well 25'. It is apparent that this arrangement of parts will prevent all drawn out of the float valve box 25 and up through injector l5 when the apparatus is shut down and there is a suction on the discharge IS. The apparatus will suck air in through the vent and break this suction in the discharge before it will suck air in through tube 20, box 25 and injector l5, if the float valve is open.

Tube 23 preferably terminates in a reduced portion 23', the lower end of which is closed by threaded member 23", whereby the tube may be conveniently drained, if necessary. Having disclosed the invention, what is claimed is:

1. In a chlorinator, a source of supply of gas under pressure, a solution device, means for conveying gas from the former to the latter, said means including a variable orifice and a calibrated meter orifice arranged in series in the order named, means including a pressure-reducing valve interposed between said source of supply and said variable orifice for maintaining the pressure on the inlet of said variable orifice substantially constant, and means for maintaining the pressure on the discharge side of said meter orifice substantially constant and at a magnitude less than the pressure on the inlet of said variable orifice.

2. Apparatus adapted to be used in the treatment of material with a gas, comprising a source of supply of gas, a solution device to which said gas is fed, said solution device including a wateroperated aspirator, a reducing valve adjacent said source of supply for reducing the pressure of the gas to a substantially constant magnitude, a variable orifice and a calibrated fixed orifice arranged in series in the order named between said reducing valve and said solution device, and means for determining the pressure on the discharge side of said fixed orifice, said means ineluding a column of water raised to a certain height by said aspirator, and means for maintaining said height substantially constant.

3. Gas feeding apparatus of the character dethe water from being a V l scribed, comprising a source of supply of gas, a pressure-actuated solution device, means for feeding gas from said source of supply to said solution device, means for supplying water under pressure to said solution device, a meter interposed in said first-named means for indicating the rate of flow of gas therethrough, said meter comprising an overflow chamber, the overflow level of said chamber corresponding to and defining the zero level of said meter, said overflow level being fixed, and means actuated by said solution device for providing a constant supply of liquid to said meter and chamber.

4. In apparatus particularly adapted to provide and control a flow of gas to a body of material to be treated, a gas solution device including a water-actuated gas aspirator, a water reservoir, means providing a primary flow of water from said reservoir to said solution device, means providing a secondary flow of water from said reservoir, means for supplying gas to said solution device, a meter for indicating the rate of flow of gas to said aspirator and comprising a zero mark, said meter being provided with an overflow chamber having means forming an overflow level coincident with the said zero mark, said secondary flow being to said overflow chamber and over the overflow level thereof.

5. A gas feeding and control machine of the character described comprising a source of supply of gas, a water-actuated aspirator, connecting means therebetween including a pair of orifices in series, means for supplying water to said aspirator, a water reservoir, means for maintaining a substantially constant pressure drop across said orifices, said means including a pressure-reducing device on one side of said orifices and a riser extending from said reservoir to said aspirator on the other side of said orifices, said aspirator raising a column of water thereto from said reservoir through said riser, float-controlled means for maintaining the level of water in said reservoir substantially constant, a gas flow-indicating manometer associated with one of said orifices, one leg of said manometer being in communication with the top of said riser, means for directing a continuous minor flow of water to said leg and therefrom to said riser, a gas vent extending upwardly from said reservoir, said leg being arranged in said vent, and a vacuum tube submerged in and extending from said leg, the extent of submergence of said tube being substantially less than the height of said column of water.

6. Apparatus for treating a main flowing body of material with a gas in the form of an aqueous solution thereof comprising a source of supply of gas, a solution device, means for supplying solvent liquid to said solution device, a connecting conduit between said source of gas supply and said solution device, said conduit comprising a pair of orifices in series, means for maintaining a constant pressure drop across said orifices, a meter associated with one of said orifices and comprising an overflow chamber having means forming an overflow level corresponding to and defining the zero mark of the meter, means actuated from said solution device to maintain a constant flow of liquid to said meter and over said overflow level, and means for automatically controlling the rate of flow of gas proportionally to the rate of flow of said 'mainflowing body.

'I. The construction defined in claim 6, said last-named means including a minor flow of water proportional to the rate of flow of said main flowing body, and means for varying the feed of gas in accordance with variations in flow of said minor flow.

8. The construction defined in claim 6, said last-named means including a minor flow of water proportional to the rate of flow of said main flowing body, an orifice through which said minor flow passes, a diaphragm valve interposed in said conduit and means for transmitting pressure variations in said minor flow to said diaphragm valve.

9. In apparatus of the character described, in combination with a major flow of fluent material to be treated, a source of supply of gas, means for effecting solution of said gas and for conducting the resultant solution to the material being treated, means for feeding gas from the said source to said means, and means for measuring and indicating the rate of feed of gas comprising an overflow chamber, the overflow level of which corresponds to the zero level of said indicating means, means providing a first minor flow of water to said overflow chamber to maintain a constant slight overflow therefrom, means providing a second minor flow of water to said overflow chamber, said second minor flow being proportional to the said major flow and variable therewith, and means for controlling the feed of said gas in accordance with variations in said proportional minor flow.

10. The construction defined in claim 9, a diaphragm valve interposed in the means for feeding gas from the source of supply thereof to the solution effecting means, the diaphragm of said valve being located at the level of said overflow level, one face of said diaphragm being exposed to the pressure of gas, an orifice through which said proportional minor flow passes, and a pressure conduit for transmitting pressure from the inlet of said orifice to the other face of said diaphragm.

11. Chlorinator apparatus of the character described comprising a solution device, means for supplying a measured flow of gas to said solution device, manometer means for measuring said gas flow, means for supplying a flow of water to said solution device, a water reservoir, a float valve associated with the latter for maintaining the liquid level therein substantially constant, a valve box for said valve, a well depending from said box to a point below said liquid level, and a conduit extending from adjacent the bottom of said well to the top of said manometer means, whereby the latter is assured a constant supply of manometer liquid.

12. The construction defined in claim 11, said manometer means including an'overflow chamber, the overflow level from the latter defining the zero level of the manometer means, and said conduit terminating in said chamber.

13. Chlorinator apparatus of the character described comprising an injector-actuated solution device, means for supplying a measured flow of gas to said solution device, manometer means for measuring said gas flow, a water reservoir, means for supplying a flow of water to said solution device including a riser extending thereto from the reservoir, a float valve associated with the latter for maintaining the liquid level therein, substantially constant, a valve box for said valve, a well depending from said box to a point below said liquid level, a conduit extending from adjacent the bottom of said well to the top of said manometer means, a second well depending from said box adjacent said first well, and conduit means for supplying water to said reservoir, said feed of said gas, said meter including an overconduitmeans terminating adjacent the bottom or flow chamber provided with means forming a said second well. certain overflow level corresponding to and de- 14. Chlorinating apparatus comprising means fining the zero level or the meter, means for de- 5 for effecting a solution 01 chlorine gas in water, termining and maintaining a constant pressure 5 a source of supply of chlorine gas. means for drop in the chlorine gas between the source of separately feeding said gas and water to said supply thereof and said first-named means, and first-named means, a meter interposed between means for providing a constant supply of liquid the latter and the source ot supply of chlorine to said meter and overflow chamber.

10 gas for measuring and indicating the rate of HOWARD J. PARDEE. w 

